KAREN A DIEFENBACH (M.D.) – Pediatric Surgery Physician, NPI 1164658258
Pediatric Surgery Physician
Main info
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for KAREN A DIEFENBACH (M.D.)
700 CHILDRENS DR
COLUMBUS, OH 432052664
Phone: (614) 722-2000
Type: Mailing
555 S 18TH ST
COLUMBUS, OH 432052654
Phone: (614) 722-6200
Type: Location
2222 Cherry St Ste 1800
Toledo, OH 436082679
Phone: (614) 722-4300
Fax: (614) 722-7766
Type: Location
536 S Trimble Rd
Mansfield, OH 449063418
Phone: (614) 722-6200
Type: Location
5665 Venture Dr
Dublin, OH 430172159
Phone: (614) 722-6200
Type: Location
455 Executive Campus Dr
Westerville, OH 430828870
Phone: (614) 722-6200
Type: Location
700 Childrens Dr
Columbus, OH 432052664
Phone: (614) 722-6200
Type: Location
2213 Cherry St
Toledo, OH 436082603
Phone: (419) 251-4300
Fax: (419) 251-7766
Type: Location
26 Hospital Dr
Athens, OH 457012471
Phone: (614) 722-2000
Type: Location
Nationwide Children's Hospital, 700, Children's Drive, Livingston Park, Columbus, Franklin, Ohio, 43205, United States
ED. BLD. THIRD FLOOR
COLUMBUS, OH 432052664
Phone: (614) 722-4823
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $160.
Total Amount is formed as General ($160) + Research ($0) + Ownership ($0) = $160.
Last reported payment date: 2023-06-20 • Largest payer in this snapshot: Hologic Sales and Service, LLC ($123).
Total Amount
$160
General + Research + Ownership
Payments
3
Total payment records
General Amount
$160
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-06-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Hologic Sales and Service, LLC | $123 |
| Asensus Surgical, Inc. | $37 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2012-08-20
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20120820000450 | I | General Surgery | OH | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 43205)
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Reviews
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